The large-scale analysis of spin directions done here shows evidence of dipole and quadrupole large-scale alignment. The results with DECam data agree with previous results using [1]}, [2]}, [3]}. The observation of a large-scale axis has been proposed in the past by analyzing the cosmic microwave background (CMB), with consistent data from the Cosmic Background Explorer (COBE), Wilkinson Microwave Anisotropy Probe (WMAP) and Planck [4]}, [5]}, [6]}, [7]}, [8]}, [9]}, [10]}. Observations also showed that the axis formed by the CMB temperature is aligned with other cosmic asymmetry axes such as dark energy and dark flow [5]}. Other notable statistical anomalies in the CMB are the quandrupole-octopole alignment [12]}, [13]}, [14]}, [15]}, [16]}, the asymmetry between hemispheres [17]}, [6]}, [19]}, point-parity asymmetry [20]}, [21]}, and the CMB Cold Spot. If these anomalies are not statistical fluctuations [22]}, they can be viewed as observations that disagree with \(\Lambda \) CDM [23]}.
